Facebook users affected by Cambridge Analytica scandal jumps up to 87 million

Cambridge Analytica may have collected the data of 87 million Facebook users, instead of the 50 million that was initially reported.

The British data firm — which worked for President Trump's 2016 election campaign — collected the information from millions of other users who are mostly in the U.S., the social network said in a lengthy post Wednesday.

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"In total, we believe the Facebook information of up to 87 million people — mostly in the US — may have been improperly shared with Cambridge Analytica," the post read.

Facebook CEO Mark Zuckerberg, in a conference call with reporters Wednesday, said he hasn't fired anyone over the security scandal.

"We didn't take a broad enough view what our responsibility was," he said.

It was originally revealed that Facebook shared the data of over 50 million users with the firm. Outraged users then began using the #DeleteFacebook hashtag, and abandoning the platform.

Zuckerberg apologized for the data breach and even offered to testify before Congress after the scandal broke. He's set to testify at a House oversight panel on April 11.

The U.S. Federal Trade Commission and authorities in Europe are also investigating the breach.

Mike Schroepfer, Facebook's chief technology officer, announced in the post several privacy changes, including deleting calls and texts that are over a year old.

The company has removed the option of searching a user by entering their email or phone number.

"Given the scale and sophistication of the activity we've seen, we believe most people on Facebook could have had their public profile scraped in this way," the post reads. "So we have now disabled this feature."

Facebook will also show users the applications they've used and information that was shared. They'll have the option to delete the apps they don't want, the post reads.

The company said it would inform its users if their data "may have been improperly shared with Cambridge Analytica."

Zuckerberg said Tuesday that Facebook has taken down more than 270 Russian troll accounts operated by Internet Research Agency.

"This particular set of pages and accounts was used to target people in Russia and people speaking Russian in neighboring countries like Azerbaijan, Uzbekistan and Ukraine," he said in a post.